You're shooting film? Tell me what you have and I'll give you advice on how to use it, how much stops to overexpose, all defunct film companies, and all about color negative, black and white, and slide stocks of the past. Don't ask me about Kodachrome, it's impossible to shoot Kodachrome nowadays. Some rules of thumb: Black and white film decays slower than color film, and E-4, C-22, K-12 and K-14 are not commercially available anymore.